N3wb Boost Question

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Old 11-17-2010, 04:17 PM
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Red face N3wb Boost Question

I have come across an offer to trade my Work Emotion w/tires for a barely used Tomei 7760 and have been doing some fervent research on this particular turbo. One piece of information that I can't seem to find is this:

Would having higher boost at low rpm's better than having higher boost at higher rpm's? I'm talking in context of long-term engine life because I'm a college student with student loans so just trying to look out for my future. I don't want my gaskets blowing up at 50k miles, currently at 30k on a 2005 wrx.



The tomei seems to create most of its power in the earlier rpm's, which I would suspect means bigger combustion in the lower rpm's. Were the lower rpm's ever meant for that type of high temperature combustion or is that only safe for the higher rpm range when the engine is already in high temperature.

Spooling early sounds really intriguing to me because I'm a tq guy more than hp, but never have upgraded a turbo before so just not sure.

Thanks,
Kevin
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Old 11-17-2010, 04:42 PM
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Is that basically a 20g?
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Old 11-17-2010, 04:48 PM
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Originally Posted by wrxBRAH
Is that basically a 20g?
-Spools faster
-less upper end power
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Old 11-17-2010, 09:21 PM
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Originally Posted by woocabin
-Spools faster
-less upper end power
all the tests i saw didnt show it spooling any faster than a td05-20g. maybe a couple hundred rpm faster than my td06.

think of it like this,the turbo will make the same power on less boost which means easier on the motor.

personally for the money theres better deals out there.
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Old 11-17-2010, 09:38 PM
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Originally Posted by nation
all the tests i saw didnt show it spooling any faster than a td05-20g. maybe a couple hundred rpm faster than my td06.

think of it like this,the turbo will make the same power on less boost which means easier on the motor.

personally for the money theres better deals out there.
Same power on less boost, that's what I thought. But, it's actually more boost. Less boost in upper rpm's, but more in the lower. So my question is, is it better to have more boost in lower or higher rpm's?
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Old 11-17-2010, 10:45 PM
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Originally Posted by woocabin
Same power on less boost, that's what I thought. But, it's actually more boost. Less boost in upper rpm's, but more in the lower. So my question is, is it better to have more boost in lower or higher rpm's?
Isn't this going to spool slower than stock? Stage 2 on a stock turbo spools pretty damn quick.

Found a little info from Tomei themselves, not sure if it'll be useful. The turbo specs as compared to a VF39 are in there.

http://www.tomei-p.co.jp/news/Report-EJ25-V1.html
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Old 11-17-2010, 10:51 PM
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Engines are more prone to knocking at low rpm. So more boost down low can be dangerous.
Its not about combustion temperature, but more of how fast can you burn the mixture.
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Old 11-18-2010, 12:23 AM
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That turbo is mad tyte jdm yo.

Should be a good turbo. I don't see how hitting boost sooner would be an issue other than having quicker response. I personally prefer the kick down low vs the up top power.
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Old 11-18-2010, 12:36 AM
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How low are we talking about? 2k rpms? that would be sweet =D
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Old 11-18-2010, 07:27 AM
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That is a good turbo all around, but on a 2.0l it's going to be a bit laggy. On the 2.5l it's a bit laggier than the stock VF series turbos but it's good for about 320whp. It will definately be much laggier than your stock TD04 and will definately put more stress on the motor over time.

-- Ed
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Old 11-18-2010, 10:40 AM
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my td06-20g w/ewg and eds tune spools fast. i personally think its ideal for DD because i can drive at pretty much any rpm and not open the ewg. i can merge onto the hwy silently if i want yet it still spools really good.

go drive a few different cars and see what you can live with. any turbo will add stress. im just over 90k now with about 10k HARD miles on stock motor with 20g,injectors and ED tune. still running strong just be **** about maint. come up on the 21st to EQ and you can rip my car around and see what you think.
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Old 11-18-2010, 10:59 AM
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Originally Posted by nation
my td06-20g w/ewg and eds tune spools fast. i personally think its ideal for DD because i can drive at pretty much any rpm and not open the ewg. i can merge onto the hwy silently if i want yet it still spools really good.

go drive a few different cars and see what you can live with. any turbo will add stress. im just over 90k now with about 10k HARD miles on stock motor with 20g,injectors and ED tune. still running strong just be **** about maint. come up on the 21st to EQ and you can rip my car around and see what you think.
The difference is that the OP has a 2.0l. The 20G will be much laggier on the 2.0 than the 2.5

-- Ed
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Old 11-18-2010, 10:01 PM
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Originally Posted by nation
my td06-20g w/ewg and eds tune spools fast. i personally think its ideal for DD because i can drive at pretty much any rpm and not open the ewg. i can merge onto the hwy silently if i want yet it still spools really good.

go drive a few different cars and see what you can live with. any turbo will add stress. im just over 90k now with about 10k HARD miles on stock motor with 20g,injectors and ED tune. still running strong just be **** about maint. come up on the 21st to EQ and you can rip my car around and see what you think.
Thanks for the offer bro, but I'm stuck in SD until December for school.

Originally Posted by EQ Tuning
That is a good turbo all around, but on a 2.0l it's going to be a bit laggy. On the 2.5l it's a bit laggier than the stock VF series turbos but it's good for about 320whp. It will definately be much laggier than your stock TD04 and will definately put more stress on the motor over time.

-- Ed
Thank you sir, the answer I was looking for.

Guess I'm keeping my works for now. Anybody want them? ahah
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